Home Crop Monitoring The Agronomists, Ep 27: Mike Cowbrough and Tammy Jones on hard-to-control weeds

The Agronomists, Ep 27: Mike Cowbrough and Tammy Jones on hard-to-control weeds


From fleabane, to wild oats, to kochia, and Palmer amaranth, which weed is the hardest to kill on the farm?

For this episode of The Agronomists, host Lyndsey Smith is joined by Mike Cowbrough, weed specialist with the Ontario Ministry of Agriculture, Meals and Rural Affairs, and Tammy Jones, technical gross sales agronomist with Corteva AgriScience to cowl built-in weed administration.

Catch a brand new episode of The Agronomists each Monday night time at 8 pm E!


  • Wild parsnip, will sheep eat it? Uh, Lyndsey, have your sheep eaten wild parsnip earlier than? Toxicity concern is of phytophotodermatitis
  • Younger and succulent is the important thing to some circumstances of grazing success
  • Built-in weed administration, we’re not simply speaking about herbicides. Timing, relying on the weed species, spring functions or in-crop functions won’t be one of the best time. Canada thistle is an effective instance of this
  • Dying by a thousand cuts, numerous tiny hammers, rotation is one in every of these
  • Different weeds which can be higher managed within the fall: dandelion. Know thy enemy
  • Typically you want herbicides to whittle down the inhabitants to a degree that’s extra manageable, the place built-in approaches will work significantly better
  • Cover closure photographs. Placement of fertilizer and base fertility. Get the crop forward of the weeds
  • Why is horsetail (Equisetum spp) such a ache? Shoot materials points, getting product into the plant itself. A number of root reserve. Soil will affect your dominate your weed species
  • Clip 1:  Palmer amaranth within the U.S.
  • Greatest pre-emerge therapy on soybeans in the event you’re anxious about group 9 resistance? Can’t predict what weed shall be Group 9 resistant. Waterhemp could be one to observe. Establish probably the most considerable species in every discipline. Resistance is finally a numbers sport
  • Energetic substances which can be utilized in Ontario might by no means be a actuality for western Canada. All the time learn the label and be sure you’ve obtained the best energetic
  • A few of the powerful weeds like waterhemp are most likely a number of resistant in any case
  • What makes a weed so laborious to kill or so prone to resistance?
  • Scouting is essential. Take photos. However please take well-lit, clear photographs
  • Choice stress. Nonetheless many instances a weed is uncovered to a administration follow
  • Good kochia management in dusty, dry circumstances? Group 2 resistance. Some Group 9 resistance. Some herbicides require soil moisture for plant uptake
  • You’ll be able to’t commercialize kochia for the Christmas season
  • *Australia enters the chat. Night primrose is a matter for some down there, and it does exist in Canada, however isn’t a weed of concern
  • Human switch of weed seeds. Mike counted and recognized the species within the the underside of his boot as soon as (there are photographs)
  • Clip 2: Glyphosate resistant Canada fleabane
  • Within the east, the problem in soybeans is managing Canada fleabane earlier than planting. There’s worth in having cereals within the rotation to manage it. There are good pre-plant choices; the instruments exist it’s only a matter of implementing them earlier than the fleabane will get uncontrolled
  • How shut is the west to having Group 9 resistant wild oats?
  • What different issues can the west be doing apart from rotating crops and herbicides? Weed seed destructor. Patch administration by silage. Altering seeding date. Panicle clipping. Livestock
  • WEED MANAGEMENT LASAGNE –layers and meat!


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